Timer for internal-combustion engines.



L T. SWARTZ & A. T. WALLACE. TIMER FOR INTERNAL COMBUSHGN ENGINES.

APPLICATION FILED OCT. 22, i9i7.

14 nw/ NTORJ 4 7 L By w 2 My ATTORNEYQ Patented Feb. 4, 1919'.

F's-.3. 10 I2 :5 generator set, with 3, an enlarged UNITED siArns PATENTorrion.

IRA T. SWARTZ AND ALVIE T. WALLACE, 0F INDIANAPOLIS, INDIANA, ASSIGNORSTO SWARTZ ELECTRIC COMPANY, OF INDIANAPOLIS, INDIANA, A CQEPORATION OFINDIANA.

' TIMER FOR IN TERNAL-COMBUSTION ENGINES.

Specification lietters Patent.

Patented Feb. 4, 1919.

Application filed October 22, 1917. Serial No. 197,948.

T will whom it may concern:

Be it known that we, IRA T. SwAR'rz, a citizen of the United States,residing at Indianapolis, Marion county, and State of Indiana, and AnvrnT. WALLACE, a citizen of the United States, residing at Indianapolis,Marion county, and State of Indiana, have invented and discoveredcertain new and useful Improvements in Timers forInternal- CombustionEngines, of which the following is a specification.

Our invention relates to timers for internal combustion engines andparticularly to timers for engines having a constant speed, such asthose for driving a generator forming part of an individual electricpower plant, and the objects of the invention are to provide meanswhereby the timer may be fixed at the best predetermined position andheld against intentional or accidental change of position except withina predetermined limited range of movement, and whereby the timer is somounted in association with the units of the generator set such as theinternal combustion engine and the motor-generator as to be readilyaccessible for assemblage and removal or adjustment.

With these objects in view, our invention is embodied in preferable formin the construction and arrangement hereinafter described andillustrated in the accompanying drawings.

In these drawings, Figure 1, is a side.

view in elevation, partly in section, of a our invention appliedthereto; F ig. 2. an enlarged detail vertical section on the line 22 ofFig. 1 and Fig. detail side View of the timer.

Referring to the drawings, 1 is a stationary internal combustion engineadapted to run at constant speed, 2 is a motor-generator contact membermounted on the shaft of the said engine and 3 is a fly wheel at the endof the shaft. This fly wheel carries fixed thereon an annular wiper camt against which bears a spring 5 adapted, to be intermittently operatedby the cam and to open and close the circuits through the contactcarried by the set screw. This set screw 6 is carried by a projectingarm 7 extending from an adjustable timer plate 8 consistin of a splitring surrounding a hub 9 and having its ends connected by a clampingbolt 10 whereby the timer is fixed to the hub and may be adjustedcircumferentially thereof. The hub 9 extends from a disk 10 which issecured by screws 11 to an enlarged, fixed boss 12 preferably formedintegral with the bracket of the generator and surrounding the shaft ofthe latter.

This provision of the housing for the timer contacts on the generatorbracket at the outer end of the latter in conjunction with the mountingof the wiper cam within the fly wheel affords a construction in whichthe timer is readily accessible for. adjustment, insertion and removal.I

Formed in the periphery of the timer member 8 is an elongatedcircumferential slot 13 within which projects axially a stop screw 14mounted in the plate 10 carried by the fixed boss 12. This slot 13 is ofa predetermined length and measures a range of movement for the timerwithin which the same may be adjusted to produce the most eifectivetiming action of the constant speed engine, and the slot and pin 14 areinitially set at the time of the assemblage of parts at the correcttiming position. This arrangement prevents the timer from beingaccidentally displaced during shipment or when being set up, and yetpermits a suiticient adjustment after the generator has been tested toobtain the desired timing action.

The timer is connected to any suitable Wheel, a generator bracketadjacent said) fly 8th day of October, A, D. nineteen hundred Wheel aboss carried by said bracket and and seventeen.

surroundin said shaft, and a removable r i and circum ferentiallyadjustable and relag figk tively fixed timer element carried by saidboss adjacent to said fly wheel. Witnesses:

In witness whereof, we have hereunto set O. W. LESTER, our hands andseals at Indianapolis this CLARA SCHROEDER.

I copies of this patent mey be obtained for five cents each, biaddressing the commluioner' of 2mm,

wnhlngtol, D. 0,"

